The ObamaCare rollout was so successful, he decided to do it again with immigration reform! If you thought the first time was a nightmare, imagine 5 million illegal immigrants going through an online interview process. What could possibly go wrong?

President Obama’s executive action sparing millions of illegal immigrants from deportation will be the biggest federal program rollout since ObamaCare — and administration officials are hoping its launch, set for May, will be a lot smoother.

“The deputy secretary and I are very focused on this, and I believe we’re going to get it right,” Department of Homeland Security Secretary Jeh Johnson told Fox News on Thursday.

Still, Republican opposition to the plan that would block deportation of as many as 5 million illegal immigrants — most of them parents of children already here legally — is nearly as intense.

DHS has leased a massive office building in Crystal City, Virginia, just across the Potomac River from Washington, where a thousand federal workers and a thousand more contractors will process applications. Though forecasting turn-out of applicants is largely a guessing game, DHS predicts as many as 1.3 million people may apply in the first six months alone.

The Crystal City office demonstrates to critics just one of many problems with the President’s executive action. “Those employees are not going to ask people from all over the country to come to Crystal City to be interviewed. They’re not going to be effectively interviewed. They’re going to do online most of their work,” said Senator Jeff Sessions, R-Ala. He believes the online interview process is a recipe for fraud.